Pencil sharpener



FIG. 1 is a side, top, perspective view of the pencil sharpener;

FIG. 2 is a left side view thereof with feet thereof shown in phantom, the right side view thereof being a mirror image thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof with all of the feet and other bottom surface elements thereof shown in phantom.

The broken lines showing feet and features on the bottom are included for the purpose of illustrating environment and form no part of the claimed design. 

The ornamental design for a pencil sharpener, as shown and described. 